A dark eerie fog

This is from the NaNoWriMo Adopt-a-plot folder where writers post extra plots they won't be using.

Use it as a 10-15 minute writing prompt or go for a longer piece.

#2: "Three students are on their way home when they realize that the whole campus is surrounded by a dark, eerie fog. Every time they try to leave campus they end up back where they started. What exactly is going on here? and who is that girl in the red tattered dress that seems to be following them every where?" -- shizu_bara